Circular polarized dual-band antenna for WLAN/Wi-MAX application

Abstract

A novel square ring printed antenna has been suggested for dual‐band circular polarization (CP). The geometry contains a square patch and a square ring structure for dual‐band operation. Circular polarization is achieved using triangular cut at the boundary and right angle bend with inner perturbation. The suggested antenna is excited from the lower layer through electromagnetic (EM) coupling technique. The antenna shows good impedance bandwidths of 90 MHz (2.43‐2.52 GHz) and 800 MHz (5.7‐6.5 GHz, respectively. The antenna shows 3 dB axial ratio bandwidth of 20 MHz at lower band and 120 MHz at upper band with improved gain > 6 dBi. The simulated and measured results are well agreed with each other. The antenna is promising wideband operation at the upper band. This antenna was implemented on fiberglass reinforcement laminated Arlon substrate with dielectric constant (ɛr = 2.55), and the overall physical dimension of 30 × 30 × 3.048 mm3. The designed antenna can be extensibly applicable in WLAN/Wi‐MAX communication. The presented antenna is designed using hyperlynx IE3D and the simulated results are presented.

Analysis of Multi-Resonance Characteristics in Suspended Ring Antenna Applicable for Iot/WSN

“…Later, the dimensions of the newly introduced slots are increased, wherein the desired multi-resonance characteristics are obtained. In fact, the introduction of a slot centering to the mean perimeter line splits the ring, and the modified geometry can have analyzed as a dual-ring structure [23]. The modified final antenna geometry with slots at boundary is presented in Figure 2(b), which concludes multi-resonance characteristics with enhanced impedance bandwidth and reflection coefficient at four different frequency bands 3.4 GHz, 4.5 GHz, 5.8 GHz and 7.5 GHz.…”

Hybrid polarized microstrip antenna for multifrequency application

“…The central square patch helps to resonate at a higher frequency as its length is lesser than others . The outer square ring is responsible for lower resonant frequency and the square ring present in‐between the central square patch and outer ring causes the middle resonance . Where the outer ring is having a mean perimeter of and inner square ring is having a mean perimeter of .…”

“…The outer square ring is responsible for lower resonant frequency and the square ring present in-between the central square patch and outer ring causes the middle resonance f r / 1=m p À Á . 25 Where the outer ring is having a mean perimeter of m p1 and inner square ring is having a mean perimeter of m p2 .…”

A new compact dual band CP antenna design

“…The principle of designing a CP antenna is the two required orthogonal resonant modes with 90‐phase difference and equal amplitude . Due to the benefits of light weight, relative plain structure, broad band impedance bandwidth, good radiation efficiency and eliminate of frequency interference, multiband monopole antennas have been engrossed many antenna designers’ attentions. Hitherto, variants of multiband monopole antenna capable of producing CP have also been recommended.…”

“…In ref. , an antenna with (EM) coupling technique and double layer for dual band CP was reported. The antenna has impedance bandwidths of 90 MHz (2.43–2.52 GHz) and 800 MHz (5.7–6.5 GHz), respectively.…”